超视距空战中的多无人机武器目标分配方法

武器目标分配问题是多无人机超视距空战中的关键决策问题之一。本文考虑超视距空战的强对抗、不确定等特点给武器目标分配问题带来的新挑战，基于纳什均衡博弈思想，将超视距空战中的多无人机武器目标分配问题建模为双矩阵博弈模型，其中，基于证据理论设计多级信息融合方法计算多个无人机对抗多个目标时的总攻击有效性。在此基础上，基于纳什均衡中策略被选择的概率与遗憾值之间的关系以及超视距空战需求，将双矩阵博弈模型转换为混合整数规划模型进行求解，并通过典型案例、数值实验、仿真实验对本文方法的计算过程和有效性进行分析。结果表明，本文方法能够有效给出超视距空战中的多无人机武器目标分配方案。     

学龄前儿童屏幕暴露与情绪行为问题的相关性研究——睡眠时间的调节作用

为了探索屏幕活动、睡眠时间与情绪行为问题的相关性，笔者采用问卷调查的方式，向X市五所幼儿园1502名在园儿童 的家长发放自编问卷《学龄前儿童生活习惯和心理健康情况调查》，最终回收有效数据1241份。多因素逻辑回归和分组逻辑 回归的结果表明，过度屏幕暴露、缺少家长陪伴、睡眠时间不足是出现情绪与行为问题的危险因素，睡眠时间起调节作用。研 究结果表明，学龄前儿童需要合理利用电子屏幕，保证睡眠时间，预防情绪与行为问题的发生。     

Psychophysiological coherence training to moderate air traffic controllers’ fatigue on rotating roster

The nature of the current rotating roster, providing 24-h air traffic services over five irregular shifts, leads to accumulated fatigue which impairs air traffic controllers’ cognitive function and task performance. It is imperative to develop an effective fatigue risk management system to improve aviation safety based upon scientific approaches. Two empirical studies were conducted to address this issue. Study 1 investigated the mixed effect of circadian rhythm disorders and resource depletion on controllers’ accumulated fatigue. Then, study 2 proposed a potential biofeedback solution of quick coherence technique which can mitigate air traffic controllers’ (ATCOs’) fatigue while on controller working position and improve ATCOs’ mental/physical health. The current two-studies demonstrated a scientific approach to fatigue analysis and fatigue risk mitigation in the air traffic services domain. This research offers insights into the fluctuation of ATCO fatigue levels and the influence of a numbers of factors related to circadian rhythm and resource depletion impact on fatigue levels on study 1; and provides psychophysiological coherence training to increase ATCOs’ fatigue resilience to mitigate negative impacts of fatigue on study 2. Based on these two studies, the authors recommended that an extra short break for air traffic controllers to permit practicing the quick coherence breathing technique for 5 min at the sixth working hour could substantially recharge cognitive resources and increase fatigue resilience. Application: Present studies highlight an effective fatigue intervention based on objective biofeedback to moderate controllers’ accumulated fatigue as a result of rotating shift work. Accordingly, air navigation services providers and regulators can develop fatigue risk management systems based on scientific approaches to improve aviation safety and air traffic controller's wellbeing.     

Multilevel causal attributions on transboundary risk: Effects on attributions of responsibility,psychological distance,and policy support

This study used two randomized experiments in a prospective design (Study 1 N = 297, Study 2 N = 296) to examine how multilevel causal attribution dimensions (internal vs. external to an individual or a country) shape domestic and foreign policy support to counter transboundary risk. Results from Study 1 and 2 showed that external-country (vs. internal-country) causal attribution reduced perceptions of internal-country attributions of responsibility, which had a cross-lagged effect on support for domestic-industry policies to mitigate the risk. In contrast, perceptions of external-country attributions of responsibility increased support for foreign policies in a 2-week follow up. This study offers theoretical insights into the demarcation of multilevel causal attribution dimensions in studying media framing effects. It also highlights some important causal mechanisms of how media frames shape public support for policies aimed at transboundary risk mitigation.     

空气污染对重污染公司股票价格的影响:基于政策干预视角的经济价值研究

随着经济发展和产业结构调整，社会公众和政府部门对空气污染问题的原因和治理给予了更多关注。空气重污染公司聚焦度陡增，在经营业绩、发展前景和股市表现方面受到不同程度的冲击。本文利用2014—2019年全国地级市层面空气重污染公司的日度非平衡面板数据，研究政策干预视角下空气污染对股票交易的影响及其经济价值。相较人体弹性感知能力，以空气质量等级变化为触发条件的地方政府防治措施能够更精准地对空气污染做出反应，进而通过公司基本面和投资者情绪渠道影响股市交易。实证结果显示，空气质量等级恶化会对空气重污染公司的股价产生非持续性负面影响，且股价的短期下跌伴随换手率上升特点。经济意义检验表明，空气污染与股价短期关系的发现能够指导投资实践以获取经济增益，而空气质量指数具有改进股价预测的潜力。本文的研究对理解政策干预视角下空气污染对股票市场的影响、股价预测和投资组合均具有十分重要的理论和实践意义。     

喷画艺术及其在教学中的应用

喷画艺术具有逼真、生动的艺术效果,近年来被广泛应用于广告、动画设计和建筑等领域.喷画能够具有惟妙惟肖的写真效果,逐渐成为一门独立的艺术门类.在教学中,该绘画手法应充分考虑不同的创作目的、材料等因素,更好地发挥其独特而又强烈的艺术感染力.对喷画的充分了解能更有效地培养学生的艺术应用能力,发挥其在艺术教学中的作用.